Update 2: Llama has been returned to the Play Store this morning as promised, listed as version 1.2012.12.29.1412. As for the pesky silent mode/vibrate bug? This version's changelog indicates that it is "hopefully fixed."

Update: It looks like KebabApps has pulled Llama from the Play Store while the developer sorts out "a pain-in-the-butt problem involving silent mode," in which the app can – for some users – switch what should be silent mode to vibrate mode.